My list is definitive not because I am infallible, but because I defined the terms of all time bestness, namely, if I'm driving in my car and a TV theme song came on the radio (or satellite or, if Whitney's with me, from a bottomless iPod), how excited would I be to turn up the volume and bang it? So the Cheers theme is out (and I know Teedge is miffed -- I guarantee he would bang the Cheers theme in his Saturn unibody SUV), as is M*A*S*H, Hill Street Blues, Welcome Back Kotter, WKRP in Cincinnati, Laverne & Shirley, and All In The Family, no matter how recognizable and iconic they are. And Billy Joel sucks so Bosom Buddies is out too.
Some series have a potentially unfair advantage because they employ theme songs that are actual real songs, sort of like leftover tacos. I'll let you gripe about that in the comments.
11. Sanford and Son
Here's the full version of the Qunicy Jones song. KRS-ONE and DJ Jazzy Jeff approve of this selection (fast forward to the 4:00 mark).
10. Magnum P.I.
You knew this one would be here. It's a stitch cheesier than the rest of the songs here but it's just so fucking manly that I had to include it. If I had a 308 and this came on the radio I'd be arrested for speeding within seconds.
9. Spider-Man
Apologies to Jack Urbont, but this is the best cartoon theme of the 1960's. If I knew how to use ProTools I would make a fantastic beat out of the drums from 0:08 to 0:10. I don't know what I'd do with it though. The lyrics are admittedly campy but the music is infectiously 60's/mod. I would turn the volume up if I was on the highway. Probably not if I was cruising around with the windows down.
8. Dukes of Hazzard
Proof that my tastes include more than just big beats: a country tune! I can't find an embeddable clip so just use this link and look at this picture.

Or this video.
7. Knight Rider
Not a very good show but an oft-sampled theme song that makes my cut.
Timbaland approves:
6. China Beach
Much like Jack Urbont, Diana Ross ain't nuthing ta fuck wit.
5. Yo! MTV Raps: Ed Lover Dance
The Ed Lover Dance wasn't really the theme song for Yo! MTV Raps, but it was a prominent skit and a thoroughly enjoyable frat-party-friendly tune.
Parenthetically, it's easy to forget just how good Yo! MTV Raps was at times, due in large part to the quality of the music and lyricism of the day. Can you imagine something this lyrically impressive happening today with Lil Wayne, Soulja Boy, Waka Flocka Flame, and Gucci Mane?
4. Sesame Street - Funky Chimes Version
We've featured Funky Chimes at G:TB before and we'll do so again. It's my jam.
MF Doom approves:
3. Hung
I've only seen one episode but the intro features an early Black Keys song so it's in.
2. Boardwalk Empire
I really like Brian Jonestown Massacre. I saw them live at the Paradise in Boston and they blew me away. They were just as weird and wasted as I expected them to be and their musicianship was fantastic. Their set was a giant pulsing wall of distortion-free guitar, crisp drums, and lunatic tambourine. The entire crowd turned into defective bobbleheads, domes lolling forward and side-to-side with the throb of the music. I give their show my strongest white. It will thus surprise noone who has suffered through drunken selections from my iPod to see "Straight Up And Down" on the list, the theme song to Boardwalk Empire. Which is a very enjoyable show.
1. Miami Vice
This intro is as good as it gets, from the boobies bouncing to the bongos around 0:25 to the overall feeling of surging motion and acceleration throughout the song. The whole thing was often played on the radio at one point, and thanks to this video I now know that Jan Hammer looked like Chris Berman and dressed like Michael Irvin.
Dave posits that The Sopranos kicked off the modern age of "good" television, but I would counter that Miami Vice started the trend. The Sopranos was much better executed, but Miami Vice is a pretty impressive achievement given the limitations of network TV and the 1980's in general.
Which leads me to ask: what's the deal with 1980's swimsuit bottoms?